#1B4E63#1B4E63

#1B4E63 is a dark, moderate cyan. Relative luminance 0.066; OKLCH L 40.0% C 0.064 H 228.9°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E63
RGB	rgb(27, 78, 99)
HSL	hsl(198, 57%, 25%)
HSV	hsv(198, 73%, 39%)
CMYK	cmyk(72.7%, 21.2%, 0%, 61.2%)
CIE-LAB	lab(30.84, -9.34, -17.19)
CIE-LCH	lch(30.84, 19.56, 241.49°)
OKLab	oklab(39.98% -0.042 -0.0481)
OKLCH	oklch(39.98% 0.064 228.9)
XYZ	xyz(5.4276, 6.5820, 12.7864)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E63 #63301B

analogous

#1B6354 #1B4E63 #1B2A63

triadic

#1B4E63 #631B4E #4E631B

tetradic

#1B4E63 #541B63 #63301B #2A631B

square

#1B4E63 #541B63 #63301B #2A631B

split-complementary

#1B4E63 #631B2A #63541B

monochromatic

#071318 #0E2833 #1B4E63 #287493 #359AC3

Accessibility & contrast

On white

9.07

#1B4E63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1B4E63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E63

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E63	#FFFFFF	#000000	##FFFFFF
##1B4E63	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#434D64

Deuteranopia (green-blind)

#394563

Tritanopia (blue-blind)

#005455

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4e63;
/* rgb */ color: rgb(27, 78, 99);
/* oklch */ color: oklch(40.0% 0.064 228.9);

Tailwind

colors: {
  custom: {
    50: '#627f8f',
    500: '#1b4e63',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e63;
$custom-light: #627f8f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e63",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 99
  },
  "hsl": {
    "h": 197.5,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.39982,
    "c": 0.06391,
    "h": 228.9
  },
  "luminance": 0.06583
}

Semantic roles & 50–950 ramp

primary

#1B4E63

secondary

#985B41

accent

#7447E0

background

#F6F7F8

surface

#EBEEF0

border

#C6C9CB

text

#050A0C

muted

#7A7C7D

Preview Lab

Preview with #1B4E63

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →